Authority for the Environment, Climate, Energy and Agriculture
Report rainwater infiltrationDo you want to allow rainwater to seep into the ground on your property? Under certain conditions, rainwater infiltration is permitted without a permit and only needs to be reported/notified.
Infiltration of rainwater can be an alternative to rainwater drainage. Infiltration means that water seeps into the ground and flows away naturally.
The infiltration of rainwater generally requires a permit. However, under certain conditions, you only need to report the infiltration of rainwater on your property to the relevant authority.
- Less than 250 m² of paved area of your property is connected to the infiltration system.
- If your property is located within a water protection area: Infiltration takes place near the surface via infiltration basins or similar.
- Your property is not a contaminated site or a suspected contaminated site.
- You can ensure damage-free seepage.
If your property does not meet the requirements, you will need to apply for a water permit for infiltration.
None. You must submit the notification before you begin infiltration.
- You submit your report to the responsible authority. An online service is available for this purpose.
- You will immediately receive confirmation as a PDF document for download.
The processing via online service takes approximately 10 minutes
Receiving your report is free of charge.
Not applicable
§ 8 -10 Water Resources Act (WHG)
https://www.gesetze-im-internet.de/whg_2009/__8.html
Section 85 (1) of the Hamburg Water Act (HWaG)
https://www.landesrecht-hamburg.de/bsha/document/jlr-WasGHA2005pP85
Rainwater Infiltration Ordinance (ErlfrVersV HA)
https://www.landesrecht-hamburg.de/bsha/document/jlr-ErlfrVersVHArahmen
Keywords: Rainwater Precipitation infiltration regulations Permission under water law for the infiltration of rainwater Rainwater seepage ordinance Lowering of groundwater
Last updated: 11.10.2026